http://www.pc-experience.de/wbb2/thr...8&hilight=udma
zweiter Beitrag - da steht alles!
Ergänzung: ...UDMA-7 aka SATA-150 Modus maximal 150 MB/s
You don't have to do anything. They are already either transferring at 150MB/s if you have them set to run on a SATA1 bus, or at 300MB/s if it's running on a SATA2 bus... the BIOS and all programs that report these specs just read the active transfer mode as UDMA 5 instead of (what should technically be) UDMA 8 (UDMA 7 being the SATA1 spec of 150MB/s and UDMA 8 being the SATA2 spec of 300MB/s). This is perfectly normal, you do not have to do anything.
Sayonara